Travel with a thousand in bank (5)
I believe the answer is:
ridge
'bank' is the definition.
'travel with a thousand' is the wordplay.
'travel' becomes 'ride' (eg to ride a bus).
'with' indicates putting letters inside.
'a thousand' becomes 'G' (synonyms).
'ride' enclosing 'g' is 'RIDGE'.
'in' is the link.
(Other definitions for ridge that I've seen before include "Bump between furrows" , "Wrinkle" , "roof-tree" , "Narrow raised strip as between hills" , "High ground" .)